We look at the division of 13608021 by 88 
Our goal is to divide 13608021 by 88.

On to step 1:
88 goes into 1 0 times with a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Append the next digit (3) from the dividend to 1 and continue with: 13 / 88

Going ahead to step 2:
88 can be fit into 13 0 times, resulting in a remainder of 13.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 13 to get 13.
Include the next digit (6) from the dividend after 13, then repeat: 136 / 88

Step 3:
136 divided by 88 is 1 with a remainder of 48.
The next digit of our result is 1. 
Result so far: 1.0
Subtracting 88 from 136 leaves us with 48.
Include the next digit (0) from the dividend after 48, then repeat: 480 / 88

Going ahead to step 4:
If we divide 480 by 88, we get 5 and a remainder of 40.
Put 5 as the next digit of the answer. 
Result so far: 15.0
If we take 440 away from 480, we end up with 40.
Append the next digit (8) from the dividend to 40 and continue with: 408 / 88

Moving on to step 5:
If we divide 408 by 88, we get 4 and a remainder of 56.
The number 4 becomes the next digit in our result. 
Result so far: 154.0
The remainder is 56 after subtracting 352 from 408.
Grab the next digit (0) from the dividend, add it to 56, then carry on: 560 / 88

Let's proceed to step 6:
If we divide 560 by 88, we get 6 and a remainder of 32.
The next digit of our result is 6. 
Result so far: 1546.0
Subtract 528 from 560 to get 32.
Take the next digit (2) from the dividend and append it to 32, then repeat: 322 / 88

Advancing to step 7:
When dividing 322 by 88, we get 3 with a remainder of 58.
The number 3 becomes the next digit in our result. 
Result so far: 15463.0
If we subtract 264 from 322, we get 58.
Take the next digit (1) from the dividend and append it to 58, then repeat: 581 / 88

Step 8:
88 can be fit into 581 6 times, resulting in a remainder of 53.
Write down 6 as next digit of the result. 
Result so far: 154636.0
Deduct 528 from 581 and we're left with 53.
Since there are no more digits in the dividend, we add a zero to the remainder making it 530, and continue the process.

Let's proceed to step 9:
88 goes into 530 6 times with a remainder of 2.
The next digit of our result is 6. 
Result so far: 154636.6
Subtracting 528 from 530 leaves us with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Moving on to step 10:
88 can be fit into 20 0 times, resulting in a remainder of 20.
The number 0 becomes the next digit in our result. 
Result so far: 154636.6
Deduct 0 from 20 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

On to step 11:
200 divided by 88 is 2 with a remainder of 24.
Put 2 as the next digit of the answer. 
Result so far: 154636.602
Subtract 176 from 200 to get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Advancing to step 12:
88 can be fit into 240 2 times, resulting in a remainder of 64.
The next digit of our result is 2. 
Result so far: 154636.6022
Subtract 176 from 240 to get 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

The final result is 154636.6022 with a remainder of 0.00064.